Re: conditionally using libtool

[Bob Rossi]

On Fri, Apr 28, 2006 at 09:05:02PM -0700, Russ Allbery wrote:
> Bob Rossi <address@hidden> writes:
> 
> > I would like to have my package create a single static library and a
> > single program by default.
> 
> > However, if the user does --enable-tcl-extension, then I would like to
> > create a shared library using libtool.
> 
> > Can I do something in configure.in that says 
> >   if .. 
> >     AM_LIBTOOL
> >   fi;
> 
> > or is this invalid?
> 
> Here's what I do for INN.  It seems to work well enough.  I then use
> @LIBTOOLCC@ and @LIBTOOLLD@ (well, a variable set to that) before the
> actual compile and link commands where appropriate in Makefiles.
> 
> 
> dnl A few tests need to happen before any of the libtool tests in order to
> dnl avoid error messages.  We therefore lift them up to the top of the file.
> AC_PROG_CC
> AC_AIX
> AC_ISC_POSIX
> AC_CANONICAL_HOST
> 
> dnl Check to see if the user wants to use libtool.  We only invoke the libtool
> dnl setup macros if they do.  Keep this call together with the libtool setup
> dnl so that the arguments to configure will be together in configure --help.
> inn_use_libtool=no
> AC_ARG_ENABLE(libtool,
>     [  --enable-libtool        Use libtool for lib generation [default=no]],
>     if test "$enableval" = yes ; then
>         inn_use_libtool=yes
>     fi)
> if test x"$inn_use_libtool" = xyes ; then
>     AC_PROG_LIBTOOL
>     EXTLIB='la'
>     EXTOBJ='lo'
>     LIBTOOL='$(top)/libtool'
>     LIBTOOLCC='$(top)/libtool --mode=compile'
>     LIBTOOLLD='$(top)/libtool --mode=link'
> else
>     EXTLIB='a'
>     EXTOBJ='o'
>     LIBTOOL=''
>     LIBTOOLCC=''
>     LIBTOOLLD=''
>     AC_SUBST(LIBTOOL)
> fi
> AC_SUBST(EXTLIB)
> AC_SUBST(EXTOBJ)
> AC_SUBST(LIBTOOLCC)
> AC_SUBST(LIBTOOLLD)
> 
> -- 
> Russ Allbery (address@hidden)             <http://www.eyrie.org/~eagle/>

Thanks Russ,

This is really helpful.

Bob Rossi